Coil design for improved power transfer efficiency in inductive links

Author

Zierhofer, C.M. ; Hochmair, E.S.

Author_Institution

Inst. for Appl. Phys, Innsbruck Univ., Austria

Volume

4

fYear

1996

fDate

31 Oct-3 Nov 1996

Firstpage

1538

Abstract

The coupling coefficient of two magnetically coupled coils can be considerably enhanced, if the turns of the coils are not concentrated at the coils circumferences, but distributed across the radii of the coils. However, such a distribution of turns results in a reduction of the unloaded quality factors of the coils. If the coupled coils are used within an inductive link system for transcutaneous power transfer, enhancement of the coupling coefficient improves the efficiency of power transfer, while the reduction of unloaded quality factors caused by the suggested pattern of coil distribution reduces efficiency. In spite of this loss of efficiency, it is possible to design coils allowing a net gain in the efficiency of power transfer

Keywords

Q-factor; biomedical telemetry; coils; prosthetic power supplies; coil design; coupling coefficient; distribution of turns; inductive links; magnetically coupled coils; neuroprosthetic stimulators; power transfer efficiency; transcutaneous power transfer; unloaded quality factors; Coils; Coupling circuits; Neural prosthesis; Physics; Power amplifiers; Q factor; RLC circuits; Radio frequency; Radiofrequency amplifiers; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE

Conference_Location

Amsterdam

Print_ISBN

0-7803-3811-1

Type

conf

DOI

10.1109/IEMBS.1996.647541

Filename

647541